Home / 83,381.03-114,988.07-77,188.58

Finding the Fourth Proportional to 83,381.03, 114,988.07 and 77,188.58

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Solution

The fourth proportional to 83,381.03, 114,988.07 and 77,188.58 is: 106,448.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,381.03 : 114,988.07 = 77,188.58 : x
  2. Step 2: Convert to fraction form
    83,381.03/114,988.07 = 77,188.58/x
  3. Step 3: Cross multiply
    83,381.03x = 114,988.07 × 77,188.58
  4. Step 4: Simplify right side
    83,381.03x = 8,875,765,458.27
  5. Step 5: Solve for x
    x = 8,875,765,458.27/83,381.03
  6. Step 6: Final answer
    x = 106,448.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.